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Mercury free metal halide lamp

A metal halide lamp, metal halide technology, applied in the direction of discharge lamps, gas discharge lamps, parts of gas discharge lamps, etc. Tube blackening etc.

Inactive Publication Date: 2002-01-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors of this patent have observed through experiments that although this mercury-free metal halide lamp can prevent loss of transparency, the luminous tube gradually turns black
Therefore, although the above-mentioned technology can prevent the loss of transparency of the luminous tube, if it gradually becomes black, the characteristics of the lamp will be reduced, and the service life of the luminous tube will be shortened.
Therefore, it is still difficult to realize the practical application of mercury-free metal halide lamps

Method used

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  • Mercury free metal halide lamp
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Examples

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Embodiment Construction

[0024] Next, embodiments of the present invention will be described with reference to the drawings. For the sake of brevity, components having substantially the same functions in the following figures are denoted by the same reference numerals. In addition, this invention is not limited to a following Example.

[0025] figure 1 It is a cross-sectional view schematically showing the configuration of a mercury-free metal halide lamp according to an embodiment of the present invention.

[0026] figure 1 The shown lamp has an arc tube 1 in which a pair of electrodes (3, 3) are disposed, and an inert gas and a metal halide 7 are sealed in the arc tube 1 . But does not contain mercury. That is, the lamp of this embodiment is a mercury-free metal halide lamp.

[0027] The luminous tube 1 is made of, for example, quartz glass, and its interior is formed into a cylindrical shape. In this embodiment, xenon gas (Xe), which is an inert gas, is sealed in the arc tube 1 at a pressur...

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Abstract

A mercury-free metal halide lamp includes an arc tube including a pair of electrodes inside the tube. In the arc tube, a rare gas and a metal halide are contained, and no mercury is contained. The mercury-free metal halide lamp is horizontally operated such that the pair of electrodes is substantially horizontal. The mercury-free metal halide lamp further includes magnetic field applying means for applying a magnetic field including a component substantially perpendicular to a straight line connecting heads of the pair of electrodes in a substantially vertical direction. The density of halogen atoms evaporated during steady-state operation with respect to unit inner volume of the arc tube is 20 mumol / cc or more.

Description

technical field [0001] The invention relates to mercury-free metal halide lamps which do not contain mercury luminescent substances. In particular, it is related to lamps used in general lighting and automotive headlights composed of reflectors and the like. technical background [0002] Recently, a metal halide lamp has been widely developed and utilized as a discharge lamp. A metal halide lamp is a lamp in which a metal halide is added as a luminescent substance to mercury, and then sealed in a luminous tube. For example, it was first used in the headlights of automobiles. [0003] Figure 7 Indicates conventional metal halide lamps. Figure 7 The metal halide lamp shown has a luminous tube 1 made of quartz glass and sealing and fixing parts 2 located at both ends of the luminous tube 1 to seal the interior of the luminous tube. A pair of electrodes 3 made of metal tungsten is disposed inside the arc tube 1 , and a luminescent substance 17 including mercury and metal hal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/18H01J61/10H01J61/12H01J61/82
CPCH01J61/125H01J61/106H01J61/827H01J61/18
Inventor 高桥清金子由利子桐生英明吉田正人
Owner PANASONIC CORP